SmallWorlds In FacebookWorlds In Motion recently announced that SmallWorlds is now embeddable in Facebook. Read it here.

CityPixel: Visit Pixel YorkIf you like pixel art, Worlds In Motion reviews CityPixel, a replica of a big town made in mixel art, that is also a social virtual world, with a very neat appearance. It also has a Facebook application, as you can read here. You can have a look without having to register.